Pioneer AVIC-D3 vs. Clarion N.I.C.E. ?

Hey everybody,

I'm not sure if this is the right place to post this, I apologize if it is not. But I was wondering about these two units, the Pioneer AVIC-D3 and the Clarion N.I.C.E. I was wondering 1) which is "better" (instinct tells me the pioneer), which has "more bang for your buck," and most importantly, are there really any big differences between these two?